Advertisements
Advertisements
Question
How many atoms of each kind are present in the following molecule:
Chlorine
Solution
Chlorine (Cl2) has two chlorine atoms with a valence shell containing seven electrons. Thus, one electron is required to complete an octet.
RELATED QUESTIONS
Five atoms are labelled from A to E.
Atoms | Mass No. | Atomic No. |
A | 40 | 20 |
B | 19 | 9 |
C | 7 | 3 |
D | 16 | 8 |
E | 14 | 7 |
(a) Which one of these atoms:
(i) contains 7 protons,
(ii) has an electronic configuration 2, 7?
(b) Write down the formula of the compound formed between C and D.
(c) predict which are: (i) metals, (ii) non-metals?
State the type of bonding in the following molecule.
Calcium oxide
How are X-rays produced?
Sodium having atomic number 11, is ready to ______ electron/ electrons to attain the nearest noble gas electronic configuration.
The valency of noble gases is ______.
What is a chemical bond?
Complete the following table:
a. | Dativebond | ______ |
b. | CaH2 → Ca+H2 | ______ |
c. | ______ | Reduction |
d. | ______ | Redox reaction |
How many electrons are required or released by each atom in water molecule to attain the nearest noble gas configuration?
The one which is composed of all the three kinds of bond.[ionic, covalent and coordinate bond]
Elements A, B and C have atomic number 17, 19 and 10 respectively.
Write down the formula of the compound formed by two of the above elements.